arm64: dts: imx8mp: Enable SAI audio on MX8MP DHCOM PDK2 and PDK3

Add SAI I2S and audio bindings on MX8MP DHCOM PDK2 and PDK3.

The VDDA is supplied from on-carrier-board regulator, the VDDIO
is supplied from always-on on-SoM regulator. Except for different
I2C bus used to connect the codec, the implementation is virtually
identical on both carrier boards.

Align regulator-avdd name to regulator-3p3vdd on PDK3, since this
is the VDDA supply and it is the same on both carrier boards.
Signed-off-by: Marek Vasut <marex@denx.de>
Signed-off-by: Shawn Guo <shawnguo@kernel.org>

arch/arm64/boot/dts/freescale/imx8mp-dhcom-pdk2.dts

@@ -23,6 +23,12 @@ chosen {
 		stdout-path = &uart1;
 	};
 
+	clk_ext_audio_codec: clock-codec {
+		compatible = "fixed-clock";
+		#clock-cells = <0>;
+		clock-frequency = <24000000>;
+	};
+
 	gpio-keys {
 		compatible = "gpio-keys";
 
@@ -102,6 +108,43 @@ led-3 {
 			pinctrl-names = "default";
 		};
 	};
+
+	reg_3p3vdd: regulator-3p3vdd {	/* 3.3VDD */
+		compatible = "regulator-fixed";
+		regulator-always-on;
+		regulator-min-microvolt = <3300000>;
+		regulator-max-microvolt = <3300000>;
+		regulator-name = "3P3VDD";
+	};
+
+	sound {
+		compatible = "simple-audio-card";
+		simple-audio-card,name = "SGTL5000-Card";
+		simple-audio-card,format = "i2s";
+		simple-audio-card,bitclock-master = <&codec_dai>;
+		simple-audio-card,frame-master = <&codec_dai>;
+		simple-audio-card,widgets = "Headphone", "Headphone Jack";
+		simple-audio-card,routing = "Headphone Jack", "HP_OUT";
+
+		cpu_dai: simple-audio-card,cpu {
+			sound-dai = <&sai3>;
+		};
+
+		codec_dai: simple-audio-card,codec {
+			sound-dai = <&sgtl5000>;
+		};
+	};
+};
+
+&i2c5 {
+	sgtl5000: codec@a {
+		compatible = "fsl,sgtl5000";
+		reg = <0x0a>;
+		#sound-dai-cells = <0>;
+		clocks = <&clk_ext_audio_codec>;
+		VDDA-supply = <&reg_3p3vdd>;
+		VDDIO-supply = <&reg_vdd_3p3v_awo>;
+	};
 };
 
 &fec {	/* Second ethernet */
@@ -155,6 +198,17 @@ &pcie {
 	status = "okay";
 };
 
+&sai3 {
+	#sound-dai-cells = <0>;
+	pinctrl-names = "default";
+	pinctrl-0 = <&pinctrl_sai3>;
+	assigned-clocks = <&clk IMX8MP_CLK_SAI3>;
+	assigned-clock-parents = <&clk IMX8MP_AUDIO_PLL1_OUT>;
+	assigned-clock-rates = <12288000>;
+	fsl,sai-mclk-direction-output;
+	status = "okay";
+};
+
 &usb3_1 {
 	fsl,over-current-active-low;
 };

arch/arm64/boot/dts/freescale/imx8mp-dhcom-pdk3.dts

@@ -23,6 +23,12 @@ chosen {
 		stdout-path = &uart1;
 	};
 
+	clk_ext_audio_codec: clock-codec {
+		compatible = "fixed-clock";
+		#clock-cells = <0>;
+		clock-frequency = <24000000>;
+	};
+
 	clk_xtal25: clock-xtal25 {
 		compatible = "fixed-clock";
 		#clock-cells = <0>;
@@ -140,12 +146,30 @@ led-3 {
 		};
 	};
 
-	reg_avdd: regulator-avdd {	/* AUDIO_VDD */
+	reg_3p3vdd: regulator-3p3vdd {	/* 3.3VDD */
 		compatible = "regulator-fixed";
 		regulator-always-on;
 		regulator-min-microvolt = <3300000>;
 		regulator-max-microvolt = <3300000>;
-		regulator-name = "AUDIO_VDD";
+		regulator-name = "3P3VDD";
+	};
+
+	sound {
+		compatible = "simple-audio-card";
+		simple-audio-card,name = "SGTL5000-Card";
+		simple-audio-card,format = "i2s";
+		simple-audio-card,bitclock-master = <&codec_dai>;
+		simple-audio-card,frame-master = <&codec_dai>;
+		simple-audio-card,widgets = "Headphone", "Headphone Jack";
+		simple-audio-card,routing = "Headphone Jack", "HP_OUT";
+
+		cpu_dai: simple-audio-card,cpu {
+			sound-dai = <&sai3>;
+		};
+
+		codec_dai: simple-audio-card,codec {
+			sound-dai = <&sgtl5000>;
+		};
 	};
 };
 
@@ -161,6 +185,15 @@ i2cmuxed0: i2c@0 {
 			#size-cells = <0>;
 			reg = <0>;
 
+			sgtl5000: codec@a {
+				compatible = "fsl,sgtl5000";
+				reg = <0x0a>;
+				#sound-dai-cells = <0>;
+				clocks = <&clk_ext_audio_codec>;
+				VDDA-supply = <&reg_3p3vdd>;
+				VDDIO-supply = <&reg_vdd_3p3v_awo>;
+			};
+
 			typec@3d {
 				compatible = "nxp,ptn5150";
 				reg = <0x3d>;
@@ -263,6 +296,16 @@ &pcie {
 	status = "okay";
 };
 
+&sai3 {
+	pinctrl-names = "default";
+	pinctrl-0 = <&pinctrl_sai3>;
+	assigned-clocks = <&clk IMX8MP_CLK_SAI3>;
+	assigned-clock-parents = <&clk IMX8MP_AUDIO_PLL1_OUT>;
+	assigned-clock-rates = <12288000>;
+	fsl,sai-mclk-direction-output;
+	status = "okay";
+};
+
 &usb_dwc3_0 {
 	usb-role-switch;
 

arch/arm64/boot/dts/freescale/imx8mp-dhcom-som.dtsi

@@ -49,6 +49,14 @@ reg_usdhc2_vmmc: regulator-usdhc2-vmmc {
 		startup-delay-us = <100>;
 		vin-supply = <&buck4>;
 	};
+
+	reg_vdd_3p3v_awo: regulator-vdd-3p3v-awo {	/* VDD_3V3_AWO */
+		compatible = "regulator-fixed";
+		regulator-always-on;
+		regulator-min-microvolt = <3300000>;
+		regulator-max-microvolt = <3300000>;
+		regulator-name = "VDD_3P3V_AWO";
+	};
 };
 
 &A53_0 {
@@ -918,6 +926,15 @@ MX8MP_IOMUXC_SAI5_RXD0__GPIO3_IO21		0x141
 		>;
 	};
 
+	pinctrl_sai3: dhcom-sai3-grp {
+		fsl,pins = <
+			MX8MP_IOMUXC_SAI3_TXFS__AUDIOMIX_SAI3_TX_SYNC	0xd6
+			MX8MP_IOMUXC_SAI3_TXC__AUDIOMIX_SAI3_TX_BCLK	0xd6
+			MX8MP_IOMUXC_SAI3_RXD__AUDIOMIX_SAI3_RX_DATA00	0xd6
+			MX8MP_IOMUXC_SAI3_TXD__AUDIOMIX_SAI3_TX_DATA00	0xd6
+		>;
+	};
+
 	pinctrl_touch: dhcom-touch-grp {
 		fsl,pins = <
 			/* #TOUCH_INT */